The world standard and official disc of the USA Ultimate Championship Series since 1991. With its contoured grip and aerodynamic engineering, the Ultra-Star has set the standard for quality, consistency, and performance. ?The 175 gram Discraft Ultra-Star Ultimate disc is the official disc of the "Ultimate Players Association" for the sport of Ultimate Frisbee. The Ultra-Star Ultimate disc flies very stable and is easy to throw & catch. Great for beach play because of its stability in flight.